Acura 2002 RSX Service Manual page 567

Grade Logic Control
Ascending Control
When the pCM determines rhat the vehicle is climbing a hill in D and E positions, the system extends the
engagement area ot 2nd, 3rd, and 4th gears to prevent the transmission from frequently shifting between
2nd and 3rd
geirsl between 3rd and 4th gears, and between 4th and 5th gears, so the vehicle can run smooth and have more
power when needed.
shift schedules stored in the PCM between 2nd and 3rd gears, between 3rd and 4th gears, and between 4th and 5th
gears, enable it to automatically select the most suitable gear according to the magnitude of a gradient.
3 s o
-: FLAT ROAD MODE
: GRADUAL ASCENDING MODE
sTH - -..-..-
: MEDIUM ASCENDING MODE
: STEEP ASCENDING MODE
-.-.- -.. r HEAVY STEEP ASCENDING MODE
a
52 mph (100 km/h)
Vehicle speed
Descending Control
when the PcM determines that the vehicle is going down a hill in lE and E positions, the shift-up speed from 4th to
5th gear, from 3rd to 4th gear. and from 2nd to 3rd gear (when the throttle is closed) becomes taster than
the set speed
for flat road driving to widen the 4th gear, 3rd gear, and 2nd gear driving area. This, in combination
with engine
braking from the deceieration lock-u[, achieves smooth driving when the vehicle is descending. There are three
desceriding modes with different 4th gear driving areas, 3rd gear driving areas. and 2nd
gear driving areas according
to the mag;itude of a gradient storedin the PCM. When the vehicle is in sth gear or 4th gear, and
you are decelerating
when vou are applying the brakes on a steep hill, the transmission will downshift to lower
gear. when you accelerate,
the transmission will then return to a higher gear.
-: FL/AT ROAD MODE
.- - - - - - - - - : GRADUAL DESCENDING MODE
-..- - -. : MEDIUM oESCENDING MODE
-.-.-
.-: STEEP DESCENOING MODE
(cont'd)
ASCENDING MOoE: Upshift Schedule
62 moh {100 km/h) Vehicle spood
14-35